Support for coal-drills.



PATENTED JULY 3, 1906.

W. H. OLARKSON.

SUPPORT FOR GOAL DRILLS.

APPLICATION FILED JAN. 30.1905.

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o'aurnn STATES ENT OFFICE.

\VILLIAM H. OLARKSON, OF EDWARDS STATION, ILLINOIS, ASSIGNOR TO ELUIDEJ. CLARKSON, OF EDWARDS STATION, ILLINOIS.

SUPPORT FOR COAL-DRILLS.

Specification of Letters Patent.

Patented tuiy 3, 1906.

To ctZZ whom it may concern:

Be it known that I, WILLIAM H. CLARKSON, a citizen of the United States,residing at Edwards Station, in the county of Peoria and State ofIllinois, have invented certain new and useful Improvements in Supportsfor Coal-Drills, and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same.

This invention pertains to a device for supporting coal and othersimilar drilling-machines.

The object of the invention is to provide a member known as a grip forseating in the coal to which the drilling-machine is secured, therebeing an improved means for holding the grip in place within the coal.

A further object is to provide a wedging member for use with the gripfor assisting in holdin the latter in afirm position.

In t e drawings presented herewith and which form part of thisapplication, Figure 1 is a perspective view of my improved gripbar. Fig.2 is a side elevation of a portion thereof. Fig. 3 is a top view of aportion thereof. Fig. 4 is a perspective view of a wedge used with thegrip-bar. Fig. 5 is a perspective view of the wedge shown in Fig. 4mounted on the grip-bar, the latter being shown in section, part havingbeen removed.

Fig. 6 is a cross-section of the grip-bar, showing one end of the wedge.Fig. 7 is a top view of the bar seated in a hole in a wall of coal,showing the application of the wedge for holding said bar in place. Fig.8 is also a top view showing the wedge as in Fig. 7. 1

In the figures, A represents the grip-bar as ordinarily used, exceptthat it is provided at one end with sharp projections on all four sides.The end of the bar is flared so as to have a lip B on top and at eachside and a lip O at the bottom, which is much larger than the lips B, asshown. At the opposite end of the bar is pivoted ayoke D, on which thecoaldrill is to be mounted. Said drill, however, is not shown, since itdoes not enter into my present invention; but any approved form ofdrilling-machine may be used with the gripbar herein described.

In conjunction with the grip-bar I employ, as shown in Figs. 5, 6, 7,and 8, a wedge, (repre sented at E,) preferably, but not necessarily,

of a rounded form on its outer surface. The said wedge is provided witha V-shaped groove or channel, as at F, and each face thus presented isgiven a shallow groove G, adapted to receive the corners of thegrip-bar, as shown in Fig. 5. The groove F, as represented in Fig. 6,receives one corner of the bar, in which instance the grooves Gdescribed are not needed. The wedge, as its name implies, tapers fromone end to the other, so that it may be forced into an opening and as itenters will fill said opening more and more. In use the grip-bar when itis desired to use it in a wall of coal for supporting thedrillingmachine is entered in a hole bored for that purpose, as shown inFigs. 7 and 8. After the bar has been pushed in as far as desired thewedge E is followed in beside it, as shown, and the result of this isthat the lip B if the wedge is entered at the side of the bar is driveninto the coal, as shown in Figs. 7 and 8, and as a matter of course thetighter the wedge is driven the more firmly the bar will be held due tothe continually-increasing friction between the bar and the coal. Thatbetter results will obtain from entering the wedge on top of the bar thelower lip C will be driven downward into the coal. It will be seen thatby having a lip on each surface of the bar the wedge can be entered atany side or on top or even at the bottom. The shape of the hole or thematerial in which it is out may govern the operator as to which placethe wedge shall be entered. For instance, if by chance a harder spot isfound at one side of the hole or the other or above or below the holethe wedge is entered on the bar at the opposite side from the said hardspot, so that when entering the wedge to hold the bar the lip B or O, asthe case may be, will be forced into the hard material, with the resultthat a firmer hold will be had. If found convenient or expedient, thewedge may also be entered at the corner of the bar, as in Fig. 6, inwhich case the diagonal corner will enter the coal by portions of thelips B and C.

It will be seen from the foregoing that the operator is free to enterthe wedge wherever in his judgment the best results will be obtained.Though, as shown in the drawings, the wedge liesbetween one of the lipsB and the coal, it is obvious that the bar A may be pushed farther intothe hole and the wedge enter some distance behind the lips.

How-- ever, this is for the better judgment of the operator whenperforming his work.

As a matter of fact, I do not wish to confine myself to the exactconstruction shown in the drawings as to the form of the wedge nor ofthe bar, as changes may be made that will be found desirable withoutsacrificing the spirit and intent of theinvention.

1. In a support of the character set forth, a bar for supporting acoal-drill at one end, the opposite end of said bar having a cuttingedge at each of its four corners adapted to be forced into the coal inwhich the bar is to be held, and a wedge used in conjunction with thesaid cutting edges for entering at the side of the bar, there being agroove in said wedge for permitting a corner of the bar to enter the'wedge the latter also being rounded on its outer surface in the mannerset forth and for the purposes described.

' 2. In a support of the character described, a bar having a fiaring'endto form a sharp projecting corner on all of its sides, one being longerthan all the others, a pivoted member at the opposite end of the bar forsupporting a coal-drill, and a wedge substantially semicircular in formand having a V-shaped groove therein opposite the rounded side, saidwedge adapted for forcing one or more of the flaring corners into thecoal when entered between the bar and the coal as described.

3. A support for a coal-drill comprising a bar, a series of sharpprojecting lips at one end, one of which is longer than the others, apivoted drill-supporting member at the other end, and a wedge for use inconjunction with the bar, the same having a V shaped groove therein forreceiving a corner of the bar, and a smaller groove in each fiat surfaceof the said V-shaped groove substantially as shown and described and forthe purposes set forth.

4. A coal-drill support of the character described adapted for enteringa hole in the coal comprising a bar having several faces each of whichis flared at the end to provide proj ecting lips as described and forthe purposes explained, and a wedge substantially halfround incross-section adapted to enter .the hole next to the bar at any side orat a corner thereof for forcing one or more of the lips into the coalthere being a groove in the wedge for receiving the corners of the bar,there also being secondary grooves in the wedge substantially asdescribed and shown.

5. A coal-drill support of the character described for entrance into ahole drilled into the coal, comprising a bar substantially square .incross-section, a lip projecting from the surfaces of the bar at rightangles thereto one of them being longer than the others, and a wedgeadapted for entrance into the hole at a corner or at one side of thesupport as described, said wedge being substantially halfround incross-section and tapered, there being a V-shaped groove therein forreceiving the corner of the support, there also being small similargrooves in each surface of the first groove all for the purposesexplained.

In testimony whereof I aflix my signature in presence of two witnesses.

WILLIAM H. OLARKSON.

Witnesses:

L. M. THURLOW, E. J. ABERsoL.

